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13. A sound wave has a frequency of 425 Hz. What is the period of this wave? O a. 0.00235 seconds O b. 0.807 seconds . O c. 425

13. A sound wave has a frequency of 425 Hz. What is the period of this wave? O a. 0.00235 seconds O b. 0.807 seconds . O c. 425 seconds O d. 850 seconds 14. What best describes the relationship between wavelength and frequency in an electromagnetic wave? O Always Equal O No Relationship O Directly Proportional Inversely Proportional

13. A sound wave has a frequency of 425 Hz. What is the period of this wave? O a. 0.00235 seconds O b. 0.807 seconds . O c. 425 seconds O d. 850 seconds 14. What best describes the relationship between wavelength and frequency in an electromagnetic wave? O Always Equal O No Relationship O Directly Proportional Inversely Proportional

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Science /-Advanced Physics X X X A X . Question 3- Determine the first ten natural frequencies and mode shapes of an square membrane with length 500 mm and thickness 0.2 mm, and T=200 N/m, p=2000 kg/m². Boundaryconditions are all fixed.

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POGIL 10.3 Mr. Clough Waves Part 2 Standing waves are typically drawn like this: or or The drawings are to show the wave at two different points in its motion as it goes back and forth between two extremes. Since, with standing waves, the crests become troughs and the troughs become crests, it makes more sense to talk about two other points. The nodes are areas where the rope/string doesn't move at all (node = no desplacement). The opposite of the nodes are the anti-nodes (how clever) which are the areas of most movement/displacement. The anti-node includes both sides of the standing wave (i. this is 1 anti-node). (i.e 1 2) In the diagram above, the nodes are circled and the anti-nodes have an arrow drawn. For the diagrams below, circle the nodes and draw an arrow to the anti-nodes. # of nodes = # of anti-nodes = # of nodes = # of anti-nodes = # of nodes = # of anti-nodes = KOOL ka # of nodes = # of anti-nodes = 2

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